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===Sewage Outflow Pipe===
: ''Main article: [[Sewage Outflow Pipe]]''
Sewage outflow pipe consolidates your city's sewage and converts it into ground pollution. Roads carry sewage from your zones to your sewage outflow pipe. Sewage outflow pipes should be constructed at the edge of your city, away from residential and commercial zones and your [[Water Tower|water tower]]s.
===Sewage Treatment Plant===